Languages written with Cyrillic (Old Church Slavonic variant) script
| Language | Writing System Code | Writing System Status | SLDR/CLDR locale | Regional variants |
|---|---|---|---|---|
| Aleut | ale-Cyrs | obsolete | ale-Cyrs-US (United States) | |
| Altai, Southern | alt-Cyrs | obsolete | alt-Cyrs-RU (Russian Federation) | |
| Bulgarian | bg-Cyrs | obsolete | bg-Cyrs-BG (Bulgaria) | |
| Even | eve-Cyrs | obsolete | eve-Cyrs-RU (Russian Federation) | |
| Komi-Zyrian | kv-Cyrs | in use | kv-Cyrs-RU (Russian Federation) | |
| Romanian | ro-Cyrs | obsolete | ro-Cyrs-RO (Romania) | |
| Slavonic, Church | cu-Cyrs | in use | cu-Cyrs-RU (Russian Federation) | |
| Yakut | sah-Cyrs | obsolete | sah-Cyrs-RU (Russian Federation) |
Main page for the Cyrillic script, Old Church Slavonic variant